Sounds like you can add regular tires on run flat rims. Pardon my ignorance. I searched for it and some said you can't. I just bought a 750li with run flats. Declined the tires insurance thinking that, if I get a flat, I will just buy a pair of Continentals DWS.

Went through same search and struggle. The answer is that you can put any non run flat on and the result will be shock and awe. Crazy difference. Problem is you need to keep a cheapo slime kit or inflation kit in the trunk. They are $25 and any auto store sells them. BTW, the monitors work the same so no issue with TPMS